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GTX 20 PTO Clutch Switch


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#1 DL-North ONLINE  

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Posted June 28, 2016 - 05:27 PM

Just finished the lawn and a clutch problem came back again.

 

Some time ago, during multiple clutch on and off's (due to the reverse safety) the clutch would not re-engage, after a few minutes and retries of the switch, it engaged.  

 

Fast forward to today,

After about 1 hour of mowing this reoccurred, and would not engage again.

 

I haven't checked with the VOM yet but, what's the thoughts, switch or coil?

 

Also, I see what appears to be 3 relays on the inside of the right side of the console sidewall, 2 together and 1 slightly forward.

 

Another update - just looked at the correct wiring diagram, and there are 2 relays on this panel, in 1996ish they created a more "sophisticated" wiring schematic that has these relays and more. 

But the wiring diagram only shows 1 relay, for the cruise.

Ideas?

 

Update - after sitting for several hours it now works again. 

 

Dan 


Edited by DL-North, June 28, 2016 - 07:47 PM.


#2 Alc ONLINE  

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Posted June 29, 2016 - 07:43 AM

I'm not sure if your clutch  is like this , the Bolens members will know but here's a nice picture of a electric clutch and troubleshooting if it is . On my JD318 I had an issure like yours and it was just the air gap that was too wide . Hope it's as easy as a fix for yours

 

http://www.ganos.com...utchtesting.pdf


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#3 nyrobbie77 OFFLINE  

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Posted June 29, 2016 - 08:26 AM

That is most likely a coil issue.  When the coil gets hot, it gets out of tolerance and will no longer engage.  You can check it with an ohm meter via the power wire to the coil.  It should read 3ohms when new and anything less than 2 ohms is signs of shorting.  Also you can check the gap on the coil along the three slots around the side of the coil cover.  It should be 0.015" to 0.020". 

 

I replaced mine on last year, Bolens p/n 1754151.  After mowing for some time if I turned off the PTO then tried to re-engage, it would not engage.  Or if I mowed long enough it would get hot enough to just quit on its own.   I purchased the coil from Frank Gonsalves: fg1213@aol.com or via phone 603-679-3343.  He rebuilds these better than new.  I've had no problems since replacing mine.   


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#4 DL-North ONLINE  

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Posted June 29, 2016 - 10:12 AM

Thanks Guys, both pieces very good info.

I'll check the coil resistance after the long weekend.

 

Dan



#5 Cvans ONLINE  

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Posted June 29, 2016 - 01:19 PM

I think there is 3 three coil tension springs on that clutch. If one has lost it's tension then your clutch will have difficulty pulling in. There is instructions in the service manual on how to set the clearances.

Good luck.


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#6 blackjackjakexxix ONLINE  

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Posted June 29, 2016 - 04:47 PM

Check your air gap on the pto assembly,I have seen that cause the same issue,should be .10 to .15 if I remember correctly
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